Lansing bonnell



L. BONNELL.

Hot Air Furnace.

NQ. 101,422. f Patented-April 5, 1870.

N.PETERS, PHOTO-LITMOGRAPHER. WASHINGTON. n C.

initd getuigt `^atenttitir.

LANSING BONNELL, 0F MILWAUKEE, WISCONSIN.

Letters Patent No. 101,422, dated April 5, 1870; ntedatcd March 19, 1870.

HOT-AIR PURNACE.

The Schedule referred to in these Lettera Patent and making part of the same .To all 'whom it may concern Be it known that I, LANSING BONNELL, of the city and county'of Milwaukee and State of Wisconsin, have invented a new and useful Improvementin Furnaces; and I do `hereby declare that the following is a full, clear, and exact description thereof, which will enable those skilled in the art to make and use the same, reference being had to the accompanying drawingformingpart of this specification, in which- Figure 1 is a. ti'out view of my invention.

Figure 2, a sectional View in the line x fr, iig. l.

Figure 3, av'section of the top.

Figure 4, a section in line y y, fig. 2.

Similar letters of reference, in each of the figures,

4indicate corresponding parts.

The object of my invention is the production of a furnace which shall be economical and easily operated. A is the outside covering to the fire department.

B is the lower part of the furnace and fire-chamber.

C is the inner lower door.

D, slide openings for draught. Y

E, an upper opening in the door C, ,through which to shake the grate.

F, outside lower door.

G, opening for draught in door F.

H, upper door through which fuel is fed to the furnace.

I, air-pipes passing up through the furnace, the air passing in at the bottom and up ont at the top.

K, a hot-air box above the fire, which can be changed into a magazine for coal by taking out the bottoni of it, should it be thought necessary.

L, an air-pipe through which air is taken from the outside and conveyed to the inside of box K, and heated, and passing up round the outside of pipe L.

M, the smoke-pipes.

N, ledges on air-pipes I for hot-air box K to rest on.

O, a wire attached to the draught of door F, so as to regulate the draught without going down cellar'.

This furnace is inclosed in a brick easement, and the hot-air is taken out of the top and distributed through the building.

Operation.

Set the furnace wherever wanted, put in any kind of grate, and build a fire in it; regulate your draught by the openings in the doors C and F; build your outside air-conveyer, so as to admit cold air to the bottom of the fines, and to the top pipe L, and a gentle warmth will be diused, with the use of but little fire. A water-reservoir can be placed on top or round thel furnace as may be desired.

What I claim as my invention, and desire to secure by Letters Patent, is-

1. Doors C aud F, with their draught-openings, substantially as described.

' 2. Covering A, air-pipesI, fire-cbalnberB, and doors C and E with theirdraughtopeni1lgs, substantially as described.

3. Covering A, air-chamber Ii, air-pipes I, and airconductor L, fire-chamber B, door F, draught-opening G, and wire O, substantially as described.

4. Covering A, fire-chamber B, doors C and F with draught-openings, pipes I, air-chamber K, and air-con ductor L, substantially as described.

5. Covering A, fire-chamber B, chamber K with air-pipe L, so arranged that the cold air shall be taken through air-pipe L and carried down to the bottom of chamber K, and, being heated, rising, and passing out of the top of chamber K, substantially as 'described.

LANSING -BCNNELL Witnesses:

J. B. SMITH, W. M. Honxon. 

